China Oxygen Flowmeter Regulator, 1/2-15 Lpm, Cga-540 Handtight Nut and Nipple Inlet Connection, Find details about China Nipple Inlet Connection, Cga-540 Handtight Nut from Oxygen Flowmeter Regulator, 1/2-15 Lpm, Cga-540 Handtight Nut and Nipple Inlet Connection